Ford 8.8 Gear Set
Popular XJ rear swap from Ford Explorer. 31-spline, disc brakes, often comes with a limited-slip. 4.10s common from donor. Cheap power for 33-35" tires.
The Ford 8.8 from a 1995-2001 Ford Explorer is the most popular junkyard rear axle swap for the XJ. The Explorer 8.8 has:
- 31-spline axleshafts (vs D35's 27)
- 8.8" ring gear
- Often a factory limited-slip (Trac-Lok)
- Rear disc brakes (mid-90s+ Explorers)
- Width within an inch of stock XJ — bolts up with minor bracket work
- 5x4.5 bolt pattern matches XJ stock
Donor selection: 1995-2001 Ford Explorer/Mountaineer. Avoid Ranger 8.8 (different width, drum brakes). Some V8 Explorers came with 4.10s — the dream donor for 33" tire builds. Most Explorer V6s have 3.27 or 3.73.
Cost: $300-700 for a donor axle from a pull-a-part. Bracket kits (Iron Rock Off Road, Tom Wood's): $80-150. Gears if regearing: $300-500 plus master kit.
Regear: same as any D44-class axle. Yukon, Motive, USA Standard. Master kit important.
Disadvantages:
- Slightly narrower than XJ stock rear (about 0.5-1" depending on donor year)
- The dimples in the explorer pumpkin location may need clearance work for some XJ skids
- E-brake cable routing different
The 8.8 is generally the smart-money choice for XJs that need a stronger rear but don't want D44 cost. Strength is between 8.25 and Dana 44 — easily holds 35" tires.
Why it works
- cheap upgrade
- disc brakes included
- 31-spline
- often has 4.10 from factory
Trade-offs
- slightly narrow
- bracket fab
- Ford bolt pattern (same as XJ)
Tools required
- welder
- dial indicator
- marking compound
- press
Parts
| Part | Vendor | Est. price |
|---|---|---|
| Ford Explorer 8.8 axle (junkyard) | junkyard | ~$500 |
| Iron Rock 8.8 bracket kit | Iron Rock Off Road | ~$130 |
| Yukon 8.8 4.56 ring/pinion | Yukon | ~$200 |
Sources
Related
- Dana 44 Gear Set
- Chrysler 8.25 Gear Set
- All Jeep Cherokee XJ guides & tools
- Browse the full DIY database
Written and maintained by an AZ wheeler and driveway wrencher. How we source guides. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.